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Described in detail in this paper are the principle of Li2C2 chemical reaction and the experimental apparatus and chemical procedure. Conditional experiments on reaction temperature, Li: CO2 proportion and C2H2 yield have led to the establishment of optimum working conditions of the Li2C2 method. A comparison between the Li2C2 method and the SrC2 method previously developed in our lab. shows that the former has the advantage over the latter. 相似文献
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1974年在秦始皇陵东发现了4个兵马俑坑,其中有三个放有俑马和战车。从筑坑到制作,工程量很大。俑坑的建造和被焚毁的年代等问题,有待研究解决。 1985年6月—9月和1986年11月我室先后3次到秦俑1号坑取了棚木炭屑样品7个。经物理方法及化学方法预处理,有效地 相似文献
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